reality check

bite of the reality sandwich

A wake-up call, a reality check.

break reality

To reach or experience a nonordinary state of consciousness, especially when using psychedelics.

check and balance

Provide mutual oversight and limitation by independent organizations in order to prevent abuses of power.

check is in the mail

A common excuse used by debtors to put off creditors.

check the math

To verify the source or accuracy of something.

check through

To permit someone to continue onward, e.g. through a security checkpoint, after verifying their identity, tickets, etc.

gut check

An honest, reflective appraisal of one's true feelings concerning a matter of concern.

mugged by reality

Of a person, having experienced a sudden, harsh, confrontation with the truth or reality of a situation.